PDF malware analysis — malicious · 3f3e7cc3ccd893e5

MALICIOUS

PDF

78.1 KB Created: 2021-09-09 10:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 306f3f17890ad5fd2fe6c5f52aab1f6d SHA-1: 694b8b774d62e9c59f9c098047a3907144a256e4 SHA-256: 3f3e7cc3ccd893e5026e599a4810a6e5aaa93b256f45fa07426c5e440372007d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9958

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://infrive.ru/uplcv?utm_term=android+file+transfer+pc PDF link annotation
- http://notar-frings.de/userfiles/file/26722635015.pdfIn PDF document text
- http://propack-th.com/image/upload/File/zelup.pdfIn PDF document text
- https://tpk-m.ru/files/file/63619998863.pdfIn PDF document text
- http://muabannhagiare.net/images/uploads/files/64844610307.pdfIn PDF document text
- http://dunajecbiala.pl/upload/File/59218536640.pdfIn PDF document text
- http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42399299067.pdfIn PDF document text
- http://geoscan.it/userfiles/files/segifunurabib.pdfIn PDF document text
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/juzogoludigiwadopulebiz.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2220ccfd---pomuwojazelawotowilej.pdfIn PDF document text
- http://www.extramas.com/userfiles/files/97982151631.pdfIn PDF document text
- http://bnblspecialities.com/userfiles/files/81322842766.pdfIn PDF document text
- http://aftp.bg/userfiles/file/xuxunijivewudetijobujinoz.pdfIn PDF document text
- http://cerritos.songhakbbq.com/uploads/files/21801809923.pdfIn PDF document text
- http://hum-lucknow.org/test/fckeditor/file/jewaguxedelapuwure.pdfIn PDF document text
- http://asijskepotraviny.cz/files/file/xusunopag.pdfIn PDF document text
- https://luckysurface.itweald.com/uploads/files/613033389e1ec.pdfIn PDF document text
- http://amandatour.ru/js/ckfinder/userfiles/files/59208364254.pdfIn PDF document text
- http://ks4073.com/file_media/file_image/file/78829327928.pdfIn PDF document text
- http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/viwonipamedaj.pdfIn PDF document text
- http://shopcode.ru/uploads/file/xogutopaxope.pdfIn PDF document text
- http://sromedical.com/file_media/file_image/file/81755248435.pdfIn PDF document text
- https://navliecky.net/userfiles/file/ramumazegesubizakinolog.pdfIn PDF document text
- http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87855612274.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cdbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDBB	17432 bytes
SHA-256: `1cfe4e4e950b556d7f8750fd16e0010b3f91d73e14c3debbace892396890db34`
`font_01_sfnt_off0000facf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFACF	10596 bytes
SHA-256: `7c7af1096682b651512dc65e35d9877a219facbc6ee32dfdacb781a53f8a6a96`
`font_02_sfnt_off00011320.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11320	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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